Howto compile and use VRPN python wrappers

vrpn_python is a quick and dirty python wrapper for the vrpn client. 

What you need :
- VRPN 07.15
- SWIG 1.3.34

Basic installation :
cd vrpn
tar xzvf python_vrpn.tar.gz
cd python_vrpn
edit Makefile.python and set the environment according to your setup
make vrpn-python
(as root) make install-vrpn-python

ISSUES : 
- if vrpn_Tracker fails to load on symbol handle_update_tracker, comment out line 1124 of vrpn_Tracker.h (   //static int VRPN_CALLBACK handle_update_rate_request (void *, vrpn_HANDLERPARAM); ). I didn't find other fix so far.

Simple test of the tracker module :
 
import vrpn_Tracker

def handle_tracker(userdata,t):
    print t

t=vrpn_Tracker.vrpn_Tracker_Remote("Tracker0@localhost")

vrpn_Tracker.register_tracker_change_handler(handle_tracker)

vrpn_Tracker.vrpn_Tracker_Remote.register_change_handler(t,None,vrpn_Tracker.get_tracker_change_handler())

while 1:
    vrpn_Tracker.vrpn_Tracker_Remote.mainloop(t)


produces the following output, assuming Tracker0@localhost is the NULL tracker :

(0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0)
(1, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0)
(0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0)
(1, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0)
(0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0)
(1, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0)
(0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0)
(1, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0)
